In a few moments we reached the foot of the mound and entered the tangled undergrowth that lay between us and the sunlight of the field. Here the difficulties of fast travelling increased a hundredfold. There were brambles to dodge, low boughs to dive under, and countless tree trunks closing up to make a direct path impossible. Yet Dr. Silence never seemed to falter or hesitate. He went, diving, jumping, dodging, ducking, but ever in the same main direction, following a clean trail. Twice I tripped and fell, and both times, when I picked myself up again, I saw him ahead of me, still forcing a way like a dog after its quarry. And sometimes, like a dog, he stopped and pointed⁠—human pointing it was, psychic pointing, and each time he stopped to point I heard that faint high hissing in the air beyond us. The instinct of an infallible dowser possessed him, and he made no mistakes.